1. Division of Biology, Kansas State University, Manhattan, Kansas 66506, USA
2. Department of Reproductive Sciences, Smithsonian's National Zoological Park, Washington, District of Columbia 20008, USA
3. Department of Biological Sciences and NIH/NIAID Filarial Research Resource Repository Center, Clark Science Center, Smith College, Northampton, Massachusetts 01063, USA
4. Parasitologie compareé et Modèles expérimentaux, USM307, Muséum National d'Histoire Naturelle, 61 rue Buffon, 75231, Paris, France
5. Davee Center for Epidemiology and Endocrinology, Lincoln Park Zoo, Chicago, Illinois 60614, USA
6. Wyoming State Veterinary Laboratory, University of Wyoming, Laramie, Wyoming 82071, USA